PHYSIOGRAPHY. 



Hornblende Horn Quicksilver. 



267 



rington. Similar, though more slender forms of the same variety, occur 

 at Antwerp, (N.Y.) ; at which place also is found the variety Pargasite. 

 Handsome varieties of Actynolite are found at most of the steatite quar- 

 ries in Vermont ; particularly at Windham, Readsborough and New- 

 Fane : also at Middlefield, (Mass.) Massive, granular Hornblende, in 

 large easily cleavable individuals, of a shining black color, are found at 

 Plymouth, (Vt.) and at Edenville, (N.Y.) Columnar and radiating va- 

 rieties, of the same color, abound in Hawley, (Mass.) A green fibrous 

 variety, the fibres several inches long, and parallel, occurs at Cumber- 

 land, (R. I.) Massive Tremolite, as well as fibrous, abounds throughout 

 the granular limestone and dolomite of the country. The finest speci- 

 mens are found in Litchfield county, (Conn.) Hornblende asbestus 

 abounds at Staten Island, (N.Y.) at West-Farms, (Conn.) at Brighton 

 and Dedham, (Mass.) ; also near Philadelphia, in Hornblende rocks. A 

 delicate variety, in short fibres, (Byssolite,) occurs in the iron-mines of 

 Franconia, (N. H.) 



HORN QUICKSILVER. Pyramidal Pearl- 



Kerate. MOHS. 

 Primary form. Right square prism. 

 Secondary form. 



Fig. 251. 



M 



d 



M or M on el, or cl 

 M or M on c2, or c2 

 M or M on d 

 a on d 



129 30? 

 158 00 

 135 00 

 119 30 



Cleavage, parallel with M very indistinct. Fracture per- 

 fectly conchoidal. Surface smooth. 



